Genesis Dragon, Amnesty Messiah

-Stride Step-[Choose one or more cards with the sum of their grades being 3 or greater from your hand, and discard them] this card on your from face down. : 1 When this unit attacks a vanguard, you may pay the cost. If you do, choose any number of locked cards, unlock them, and this unit gets +3000 for each unit unlocked until the end of that battle. If the number of units unlocked is three or more, this unit gets +1 until end of that battle.